Which part of the gill of fish is involved in gaseous exchange?

Here are the solutions to the questions:

1. The organism that exists as a particle and replicates only inside living cells is a virus. Viruses are obligate intracellular parasites.

   • D. virus

2. The structure responsible for buoyancy of Tilapia in water is the swim bladder. This organ helps fish control their depth in the water column.

   • C. swim bladder

3. The correct sequence of the taxonomic hierarchy in the order of increasing similarities of members (from broadest to most specific) is Kingdom, Phylum, Class, Order, Family, Genus, Species.

   • D. Kingdom $\to$ Phylum $\to$ Class $\to$ Order $\to$ Family $\to$ Genus $\to$ Species

4. Liverworts belong to the Division Bryophyta. Bryophytes are non-vascular plants that include mosses, liverworts, and hornworts.

   • D. Bryophyta

5. The part of a moss plant that contains spores is the capsule. The capsule is where spores are produced and released for reproduction.

   • D. capsule

6. The organelle in Amoeba that is responsible for osmoregulation is the contractile vacuole. It expels excess water to prevent the cell from bursting in a hypotonic environment.

   • C. contractile vacuole

7. When a red blood cell is placed in water for 24 hours, the cell will burst. Water will move into the cell by osmosis, causing it to swell and lyse (burst) because animal cells lack a rigid cell wall.

   • A. burst

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